The Xbox controller caused your PC to power off.
The Xbox controller caused your PC to power off.
I experienced a comparable issue. Unless the USB port fails, the problem likely lies with the USB cable or controller, possibly damaged by a short circuit, causing the PC to shut down or fail to boot.
It seems to power down instantly. Possible reasons include properly installed USB Cables on the motherboard header, internal issues within the USB Connectors, or a faulty cable causing shorts. Test connecting it to various ports on both sides to determine the source of the problem.
The biggest issue often lies in the power supply (the Xbox controller might be faulty and draw more power than needed). It also happened to me once; switching to a basic controller resolved the problem. Make sure your main power switch is providing the correct amount of power to the CPU.
Yes, it stops right away. That means I’ll need to purchase a fresh Xbox controller.
Consider alternative USB ports both behind and in front. Test with different USB devices, especially those that draw more power. As this issue occurred after you installed a new GPU, we should verify your hardware specs to confirm if the problem lies with your PSU. - (Apologies, I missed the bottom of your message. Seems like a smartphone comment... not ideal.)
Your listed connections aren't fully detailed, though I assume you haven't exceeded the 700W limit. Right now, I'd estimate you're using around 370-390W.
Confirming the faulty cable issue. Install a fresh cable for the controller, and the problem should resolve.